# gobject_worker.py
#
# MIT License
#
# Copyright (c) 2020 Andrey Maksimov <meamka@ya.ru>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

import logging
import threading
import traceback

from gi.repository import GLib


class GObjectWorker:

    @staticmethod
    def call(command, args=(), callback=None, errorback=None):
        def run(data):
            command, args, callback, errorback = data
            try:
                result = command(*args)
                if callback:
                    GLib.idle_add(callback, result)
            except Exception as e:
                e.traceback = traceback.format_exc()
                if errorback:
                    GLib.idle_add(errorback, e)

        if errorback is None:
            errorback = GObjectWorker._default_errorback
        data = command, args, callback, errorback
        thread = threading.Thread(target=run, args=(data,))
        thread.daemon = True
        thread.start()

    @staticmethod
    def _default_errorback(error):
        logging.error("Unhandled exception in worker thread:\n%s", error.traceback)
